Your third option is not applicable. I run Barca on PC in a directory, which I synchronize to my flashdrive. The directories on PC and flashdrive are different. Moreover, the driveletter could from D:\ to Z:\

I will try the base path. Are there apt scripts in the "Skripts"-section for download as example for using this base path? There are so many scripts.....

We're not understanding each other. A relative path is a mere convenience. A system that supports relative paths, such as MS-DOS and HTML, understands both a fully qualified file name (e.g., http://www.yahoo.com/images/joe.jpg) and a partial file name (e.g., images/joe.jpg) where the working directory (http://www.yahoo.com/) is implied. This working directory is explicitly supplied beforehand in the script or is a default. Without a working directory, support for relative paths is of no help to you. With a working directory, you don't need a relative path.

Am I right in thinking that your problem is that the working directory is an unknown?

Well..... the working directory is partly unknown. On PC it is for example J:\a\b\c\portable\Barca, and on the flash drive it is [unknown driveletter]\portable\Barca.
So, I think, the working directory is \portable\Barca or just \Barca.

So, how can I set \portable\Barca as working directory in the script?

I simply want to call a program from Barca with a script. One click, and the program (in the Barca directory (\portable\Barca or \Barca - opens), indifferent form which computer I run Barca.

I am new to this program, and I donÃ‚Â´t know, how to tell Barca this working directory. I just modified the "calculator" script, delivered with barca, and this works with absolute paths and any program.

I would appriciate, if you could tell me the code for the working path.